Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-97506: crypto: ixp4xx - fix buffer chain unwind on allocation failure

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 028a7f4f3d69e551f6bf9f728d547bbf4cfc707d, 04cb00106ca4d0fa9eca24cadc4eda6036e855c8, 2.6.28; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 028a7f4f3d69e551f6bf9f728d547bbf4cfc707d, 04cb00106ca4d0fa9eca24cadc4eda6036e855c8, 2.6.28; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: crypto: ixp4xx - fix buffer chain unwind on allocation failure chainup_buffers() builds a linked list of buffer descriptors for a scatterlist. If dma_pool_alloc() fails while constructing the list, the current code sets buf to NULL and later dereferences it unconditionally at the end of the function: buf->next = NULL; buf->phys_next = 0; This can lead to a null-pointer dereference on allocation failure. If the failure happens after part of the descriptor chain has already been allocated and DMA-mapped, the partially constructed chain also needs to be released. Fix this by terminating the partially constructed chain on allocation failure and letting the callers unwind it via their existing cleanup paths. Also fix ablk_perform() to preserve the hook pointers before checking for failure, so partially built chains can be freed correctly.

—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 3, 2026
EPSS
0.1% · 5th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-97506

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5a80273150a8a1725fa70418d106eb1f2ee8fd2f, 82a8becb9c2c52fc5e67057a43aeded1f0731e7b, 68845515c8b11791b547a2838e22c27dfa3115ee, 2.6.30affected
    • 0d44dc59b2b434b29aafeae581d06f81efac7c83 and later · before d4007867be42d71795b78fa7f8ce7514dda9ca83affected · git
    • 0d44dc59b2b434b29aafeae581d06f81efac7c83 and later · before 4918b0bd7d2baafb45d87dca9e322137c96005c2affected · git
    • 0d44dc59b2b434b29aafeae581d06f81efac7c83 and later · before 8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991affected · git
    • 0d44dc59b2b434b29aafeae581d06f81efac7c83 and later · before 04cb00106ca4d0fa9eca24cadc4eda6036e855c8affected · git
    • 0d44dc59b2b434b29aafeae581d06f81efac7c83 and later · before 028a7f4f3d69e551f6bf9f728d547bbf4cfc707daffected · git
    • 0d44dc59b2b434b29aafeae581d06f81efac7c83 and later · before 25056329384010a8672552b134f609601dc4f80eaffected · git
    • 2.6.27.22 and later · before 2.6.28affected · semver
    • 2.6.28.10 and later · before 2.6.29affected · semver
    • 2.6.29.3 and later · before 2.6.30affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-97503Sep 24, 2026 · genirq/proc: Size interrupt directory names for 10-digit interrupt numbers
    0Monitor
  • ← EarlierCVE-2026-97505Sep 24, 2026 · PCI/sysfs: Add CAP_SYS_ADMIN check to __resource_resize_store()
    0Monitor
  • Later →CVE-2026-97507Sep 24, 2026 · media: dm1105: fix missing error check for dma_alloc_coherent
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux028a7f4f3d69e551f6bf9f728d547bbf4cfc707dVendor (CNA)
Linux Linux04cb00106ca4d0fa9eca24cadc4eda6036e855c8Vendor (CNA)
Linux Linux2.6.28Vendor (CNA)
Linux Linux2.6.29Vendor (CNA)
Linux Linux2.6.30Vendor (CNA)
Linux Linux25056329384010a8672552b134f609601dc4f80eVendor (CNA)
Linux Linux4918b0bd7d2baafb45d87dca9e322137c96005c2Vendor (CNA)
Linux Linux8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991Vendor (CNA)
Linux Linuxd4007867be42d71795b78fa7f8ce7514dda9ca83Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records